.app_bg{
    background:url("../img/index_bg.jpg");

    width:100%;
    height:100%;
    position:fixed;
    background-size:cover;

}

.main{
    height: 80%;
    margin-top: 8%;
}

.main_left{
    height: 100%;
    background-size: cover;
    background-color: rgb(242,245,250);
    padding-top: 60px;
}
.main_left img{

    opacity:0.7;


}

.main_right{
    height: 100%;
    position: relative;
    background-color: rgb(255,255,255);
}

.main_right .topright{
    position: absolute;
    height: 70px;
    width: 70px;
    border-radius: 10px;
    left: 510px;
    top: -10px;
    background-color: rgb(3,133,195);

}